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Charge-transfer excitons in strongly coupled organic semiconductors

Jean-François Glowe 1 Mathieu Perrin 1 David Beljonne 2, 3 Sophia C. Hayes 4 Fabrice Gardebien 5 Carlos Silva 1
1 UdeM - Université de Montréal
2 Laboratory for Chemistry of Novel Materials
3 Georgia Institute of Technology [Atlanta]
4 University of Cyprus [Nicosia]
5 DSIMB Réunion - Dynamique des Structures et Interactions des Macromolécules Biologiques - Pôle de La Réunion
BIGR (UMR_S_1134 / U1134) - Biologie Intégrée du Globule Rouge
Abstract : Time-resolved and temperature-dependent photoluminescence measurements on one-dimensional sexithiophene lattices reveal intrinsic branching of photoexcitations to two distinct species: self-trapped excitons and dark charge-transfer excitons (CTXs; ≳5% yield), with radii spanning 2–3 sites. The significant charge-transfer exciton (CTX) yield results from the strong charge-transfer character of the Frenkel exciton band due to the large free-exciton bandwidth (∼400 meV) in these supramolecular nanostructures.
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https://hal.univ-reunion.fr/hal-01198470
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Submitted on : Sunday, September 13, 2015 - 2:30:04 PM
Last modification on : Friday, September 11, 2020 - 3:09:32 AM

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Jean-François Glowe, Mathieu Perrin, David Beljonne, Sophia C. Hayes, Fabrice Gardebien, et al.. Charge-transfer excitons in strongly coupled organic semiconductors. Physical Review B: Condensed Matter and Materials Physics, American Physical Society, 2010, 81 (4), pp.041201. ⟨10.1103/PhysRevB.81.041201⟩. ⟨hal-01198470⟩

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